157 



serted the nuts and crept beneath the litter in the bottom of the cage, where they 

 spun tough, graj'ish cocoons. The larvie were found on the 8th of May, spun their 

 cocoons in June, and the moths issued on the following dates: March 4, 12, 13 (four) 

 15,. 18, 24 (two), 25 (two), 27, and 29 (two). 



Fully five-sixths of all of the walnuts growing upon the trees on one of the hills 

 near the city of Los Angeles were or had been infested by one of these larvai„ They 

 enter the nuts when the latter are from a half to three-fourths of an inch in diameter. 



The moth is very close to Proteopteryx emarginana Wlsm., but is nev- 

 ertheless distinct, and it may be a new species ; but this point we shall 

 decide after receiving a larger series of adults. 



LITTLE KNOWN ENEMIES OF THE POTATO PLANT IN NEW YORK. 



The occurrence of the Cucumber Flea-beetle, Crepidodera cucumeris 

 Harris, in immense numbers in the potato fields of New York the pres- 

 ent season has, no doubt, resulted in much damage to the crop. But 

 as the beetles were associated with Cosmopepla carnifex Fab. in this work 

 of destruction in western New York, a similar state of affairs may have 

 existed elsewhere, and the damage have been entirely attributed to the 

 beetles. This fact would be of economic importance, as a remedy that 

 might be effective in fighting the one might be worthless in destroying 

 the other. 



Singularly enough, the only locality where the species under consid- 

 eration has previously been reported as injuring the i^otato was in 

 Livingston County also, it having been sent to Professor Lintner from 

 Souyea about the middle of July, several years ago, and mentioned by 

 him in his second report as State entomologist of New York, p. 144. 

 Professor Lintner also states that the same insect was reported very 

 injurious to the fruit of the Currant about Montreal, Canada, in 1884, 

 where it reappeared the following year in still greater numbers. 



On August 0, 1888, Prof. James Troop, of La Fayette, lud., sent me 

 specimens of Cosmopepla carnifex from Livonia, Livingston County, N. 

 Y., with the information that they were swarming on the potato tops, 

 especially among the curled leaves, which they punctured, these leaves 

 afterwards withering up, turning black, and ultimately falling oft", evi- 

 dently to the serious detriment of the crop. When placed in the box 

 in which they were sent to me the insects were nearly all yet in the pupal 

 stage, but on reaching me, on the 12th, only one pupa appeared, the re- 

 mainder having reached the adult stage, and in one instance the female 

 had oviposited on one of the inclosed leaves. 



The bugs were transferred to new quarters and given fresh plants, 

 upon which they subsisted continually till the 24th, when they were 

 killed and preserved. 



Prof. Herbert Osborn, of Ames, Iowa, tells me that he has observed 

 these bugs on the foliage of the grape, and very kindly forwarded me 

 specimens of the eggs for comparison with those obtained by myself. 



The egg is four-fifths of a millimeter in length and three-fifths of a 

 millimeter in diameter, cupuliform, with a ring of about 16 long, sleu- 



